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Top Forums Programming How to Find who is calling me? Post 62204 by S.P.Prasad on Monday 14th of February 2005 01:34:39 AM
Old 02-14-2005
Standard C defines a predefined identifier __func__ which stores the name of the function as static const char currently being executed.

int function1(char * name )
{
// do something
printf ( "In f1 - Called by[%s]\n" , name ) ;
return 0 ;
}

char function2(char * name )
{
// do something
printf ( "In f2 - Called by [%s]\n" , name ) ;
function1((char *)__func__) ; // is function2 knows function2 is calling me?
return '' ;
}

int main()
{
function1((char *)__func__) ; // is function1 knows I called by main?
function2((char *)__func__) ;
return 0 ;
}
 

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xerbla_array.f(3)						      LAPACK							 xerbla_array.f(3)

NAME
xerbla_array.f - SYNOPSIS
Functions/Subroutines subroutine xerbla_array (SRNAME_ARRAY, SRNAME_LEN, INFO) XERBLA_ARRAY Function/Subroutine Documentation subroutine xerbla_array (character(1), dimension(srname_len)SRNAME_ARRAY, integerSRNAME_LEN, integerINFO) XERBLA_ARRAY Purpose: XERBLA_ARRAY assists other languages in calling XERBLA, the LAPACK and BLAS error handler. Rather than taking a Fortran string argument as the function's name, XERBLA_ARRAY takes an array of single characters along with the array's length. XERBLA_ARRAY then copies up to 32 characters of that array into a Fortran string and passes that to XERBLA. If called with a non-positive SRNAME_LEN, XERBLA_ARRAY will call XERBLA with a string of all blank characters. Say some macro or other device makes XERBLA_ARRAY available to C99 by a name lapack_xerbla and with a common Fortran calling convention. Then a C99 program could invoke XERBLA via: { int flen = strlen(__func__); lapack_xerbla(__func__, &flen, &info); } Providing XERBLA_ARRAY is not necessary for intercepting LAPACK errors. XERBLA_ARRAY calls XERBLA. Parameters: SRNAME_ARRAY SRNAME_ARRAY is CHARACTER(1) array, dimension (SRNAME_LEN) The name of the routine which called XERBLA_ARRAY. SRNAME_LEN SRNAME_LEN is INTEGER The length of the name in SRNAME_ARRAY. INFO INFO is INTEGER The position of the invalid parameter in the parameter list of the calling routine. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Definition at line 91 of file xerbla_array.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.1 Sun May 26 2013 xerbla_array.f(3)
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